The ascorbic acid, CH;Os (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was determined by titration with a standard solution of potassium iodate, KIO,. The KIO, solution was prepared by dissolving 100.4 mg primary standard grade KIO; (214.001 mg/mmol) to a final volume of 250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCl and 5 mL of starch solution were added and subsequently titrated, requiring 18.19 mL of the KIO; titrant. The relevant reactions are given below: KIO, + 5KI + 6H* → 31; + 6K* + 3H;0 CH;O, + 12 → CH,O, + 21- + 2H a. How many millimoles of ascorbic acid is in the titrated sample? b. What is the mass of ascorbic acid per bottle of the peach juice?

The ascorbic acid, CH;Os (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was determined by titration with a standard solution of potassium iodate, KIO,. The KIO, solution was prepared by dissolving 100.4 mg primary standard grade KIO; (214.001 mg/mmol) to a final volume of 250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCl and 5 mL of starch solution were added and subsequently titrated, requiring 18.19 mL of the KIO; titrant. The relevant reactions are given below: KIO, + 5KI + 6H* → 31; + 6K* + 3H;0 CH;O, + 12 → CH,O, + 21- + 2H a. How many millimoles of ascorbic acid is in the titrated sample? b. What is the mass of ascorbic acid per bottle of the peach juice?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The ascorbic acid, C,H;Os (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was
determined by titration with a standard solution of potassium iodate, KIO3. The KIO; solution was
prepared by dissolving 100.4 mg primary standard grade KIO; (214.001 mg/mmol) to a final volume of
250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCl and 5 mL of starch solution
were added and subsequently titrated, requiring 18.19 mL of the KIO; titrant. The relevant reactions are
given below:
KIO; + 5KI + 6H* → 3l2 + 6K* + 3H;0
CH;O, + l2→ CH,O, + 21- + 2H*
a. How many millimoles of ascorbic acid is in the titrated sample?
b. What is the mass of ascorbic acid per bottle of the peach juice?

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